EllisDon is a global construction and building services company that offers a range of services including construction management, design-build, and project management. Founded in 1951 and headquartered in Mississauga, Ontario, Canada, the company has established a strong reputation for delivering complex projects efficiently and effectively. EllisDon operates across various sectors, including healthcare, education, commercial, and infrastructure, and is recognized for its innovative approach, incorporating technology and sustainability into its projects.